Donating Icons

Occasionally one of the things I do is waste precious time drawing icons. It's a diversion from coding, and then I get back to coding. If I've drawn something original from scratch, and I want to donate it to the public domain, especially for Linux and GNOME, where do I submit it?

For instance, it bothered me that no one seemed to have an "IDE" icon that made you think of integrated development environments instead of things like fish or furry animals. So, I drew one that looked sort of like the IDE screen, but only prettier.